Adaption

You force the body to remember older shapes. Choose a number of willing creatures you can see within range equal to the level of the spell slot used to cast this spell. Until the spell ends, each target adapts to its surroundings. A target can breathe air and water, ignores the effects of nonmagical extreme heat, extreme cold, high altitude, and deep water pressure, and gains a swimming speed equal to its walking speed.

The target’s skin, scales, hair, or clothing subtly hardens, slickens, or thickens to suit the environment. While adapted in this way, the target gains a +1 bonus to AC.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, you can target one additional creature for each slot level above 3rd.